664423146 has 24 divisors (see below), whose sum is σ = 1440189504. Its totient is φ = 221381160.

The previous prime is 664423139. The next prime is 664423159. The reversal of 664423146 is 641324466.

664423146 is a `hidden beast` number, since 6 + 644 + 2 + 3 + 1 + 4 + 6 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 664423146.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46381 + ... + 58991.

It is an arithmetic number, because the mean of its divisors is an integer number (60007896).

Almost surely, 2^664423146 is an apocalyptic number.

664423146 is an abundant number, since it is smaller than the sum of its proper divisors (775766358).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664423146 is a wasteful number, since it uses less digits than its factorization.

664423146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15546 (or 15543 counting only the distinct ones).

The product of its digits is 82944, while the sum is 36.

The square root of 664423146 is about 25776.4067705334. The cubic root of 664423146 is about 872.5994154965.

The spelling of 664423146 in words is "six hundred sixty-four million, four hundred twenty-three thousand, one hundred forty-six".